A 2000 study that surveyed 1,090 former NFL players found that more than 60 percent had suffered at least one concussion during their career.Concussions, a type of traumatic brain injury, generally occur when the head either spins rapidly or accelerates quickly and then stops — like when a player ta

It's well known that in March 1981, John Hinckley attempted to assassinate Ronald Reagan. What's not well known is that several years later the life of President Reagan and the life of his vice president, George H.W. Bush, were threatened again. In fact, not just once."

Post-traumatic stress disorder, or PTSD, is a condition closely associated with the battlefield. But Michael Ferrara developed PTSD without going to war -- he spent three decades living and saving lives in Aspen, Colo.